Javascript类中的AJAX调用（原型函数）

I am implementing a Javascript class which I am having trouble getting to work. After I initialize an instance of the class, I then call a method of that class which makes an AJAX request. The data that is returned on 'success' of the AJAX function is then needed to be set to the a property of that instance. When I output the this.results variable later in my code, it is empty when it shouldn't be. Here is my code:

我正在实现一个Javascript类,我无法上班。在初始化类的实例之后,我然后调用该类的方法来生成AJAX请求。然后,需要将在AJAX函数“成功”时返回的数据设置为该实例的属性。当我在我的代码中稍后输出this.results变量时,它不应该是空的。这是我的代码:

//Individual Member Class
function GetReports(options) {  
    this.options = options;
    this.results = {};
}

GetReports.prototype.getResults = function() {
    jQuery.ajax({
        type      :  'post',
        dataType  :  'json',
        url       :  'reporting/getStaffMemberReports',
        async     :  false,
        data      :  options,
        success   :  function(data) {
            this.results = data;
            setResult(this.results);
        }
    }); 
}

GetReports.prototype.returnResults = function(type) {   
    if(type === "JSON") {       
        JSON.stringify(this.results);
    } else if (type === "serialize") {
        this.results.serialize();
    }
return this.results;
};

GetReports.prototype.setResult = function(data) {
    this.results = data;
};

And my code which creates an instance of the 'class':

我的代码创建了'class'的实例:

var jsonString = <?php echo json_encode($JSONallocatedStaffMembers); ?>;
    options = {
        all     : true,
        members : JSON.parse(jsonString),
        type    : 'highperform'
    };
    var all = new GetReports(options);
    all.getResults();
    var results = all.returnResults("JSON");
    console.log(results);

Now, as the AJAX call is asynchronous, I was thinking this may be the issue? I have tried putting 'async : false,' in but that doesn't help. Can anyone see where I am going wrong?

现在,由于AJAX调用是异步的,我认为这可能是问题所在?我尝试过'async:false',但这没有用。任何人都可以看到我错在哪里?

1 个解决方案

#1

There is one thing to be fixed here.

这里有一件事需要解决。

The this

inside ajax callback refers to ajax object, and not your GetReport instance. You have to declare a var on getResults and point it to this before make the ajax.

在ajax内部回调是指ajax对象,而不是你的GetReport实例。你必须在getResults上声明一个var并在创建ajax之前将其指向this。

GetReports.prototype.getResults = function() {
    var self = this;
    jQuery.ajax({
        type      :  'post',
        dataType  :  'json',
        url       :  'reporting/getStaffMemberReports',
        async     :  false,
        data      :  options,
        success   :  function(data) {
            self.results = data;
            setResult(self.results);
        };
    }); 
}

#1